Depends on what you are looking for. Mathematics is mostly deductive but Science is inductive. A good site to try inductive skills is http://www.shldirect.com/inductive_reasoning.html The best site I know of for mathematical induction is
http://www.cut-the-knot.org/cgi-bin/dcforum/ctk.cgi?conf=DCConfID1 [Broken] from that page click search type in induction and there are 107 topics re induction to choose from. some are discussions, some are problem solutions etc.